/*
 * Copyright (c) 2016-2021 Michael Zhang <yidongnan@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package net.devh.boot.grpc.client.config;

/**
 * Identifies the negotiation used for starting up HTTP/2.
 *
 * @see io.grpc.netty.shaded.io.grpc.netty.NegotiationType NegotiationType
 */
// This class needs to be duplicated to avoid direct dependencies to either of the grpc-netty (shaded) libraries.
public enum NegotiationType {

    /**
     * Uses TLS ALPN/NPN negotiation, assumes an SSL connection.
     */
    TLS,

    /**
     * Use the HTTP UPGRADE protocol for a plaintext (non-SSL) upgrade from HTTP/1.1 to HTTP/2.
     */
    PLAINTEXT_UPGRADE,

    /**
     * Just assume the connection is plaintext (non-SSL) and the remote endpoint supports HTTP/2 directly without an
     * upgrade.
     */
    PLAINTEXT;

}
